Improvement in elliptic springs



P. KEBLER. Vehicle Spring.

No. 99,776. Patented Feb.15, 1870.

lll'l lll'll MFETEHS, FHOTwLImOGRAPHER, WASHINGTON, I)v C.

diluted finite-z @Httlttdiijlflitt.

FRANK KEELER, OF BRIDGEPORT, CONNECTICUT, ASSIGN OR TO TOMLINSON SPRINGAND'AXLE COMPANY, OF SAME PLACE.

Letters Patent No. 99,7 7 6, dated February 15, 1870.

IMPROVEMENT IN ELLIP'IIC SPRINGS.

The Schedule referred to in these Letters Patent and making part of thesame I, FRANK KEELER, of Bridgeport, in the county of Fairfield, Stateof Connecticut, have invented certain Improvements in Elliptic Springs,of which thefollowing is a specification.

Nature and Object of my Invention. To socombine and arrangean elasticpacking with metallic t-himble and fixed bolt in the eyeof ellipticsprings that it will relieve much of the wear and strain to the springcaused by concussion in use.

Description of Accmnpany'ing Drawings.

Figure 1 is a sectional view of eye and leaf of spring;

Figure 2, transverse section ofsame.

Figures 3and 4, details of bolt and ear.

- General Description.

a a, fig. 1, shows the leaf of spring with the eye filling. I

b b, figs. 1 and 2, show the locking springs.

c c, figs. 1 and 2, the elastic packing.

Fig. 3 shows the thimhle cut lengthwise.

Fig. 4 shows the bolt with stop 0 1 1 The manner of construction isreadily understood. I make the eye of leaf about double the size usuallynsed. The ear is forged to match this. I then take a brass or steelt-himble oi the .proper size to fit bolt, and force it through a rubberor other elastic material whose outside diameter is greater than theinside (liameterof the eye of leaf. The elasticity qfithe rubber drawsittight around the thiinble. I then force the whole through the eye ofleaf. l

I also forge the projecting wedge for the bolt 0, and out thecorresponding recess 9 in ear, to form a stop for the purpose of keepingthe bolt in one position, and assist me in turningthe nut home.

I do not claim the insertion of rubber intheeye of leaf as new. a Thenovelty of my invention consists in theintroduction of the tliimble orfriction-sleeve around bolt to receive the. rotary wear caused by theelliptic action ofleaves when the same are at work, and allowing theelastic material to act only a cushion.

' To make the intention still lnore efiective, I arrange thewedge-shaped projection or bolt and corresponding recess g in the ear,to keep the bolt in one position,

. thereby making the wear equal and true; whereas, if it .was loose, andallowed to rotate by the motion of the spring, it becomes worn,irregular, and greatly increases thewear. ---Thisstop also prevents itsrattling, and holds the boltfi'om turning when the nut is turned up.ltalso tend's'I-o keep the n utfrom working loose and workiu g ofi',

common in cases where the bolt is allowed to revolve.

Forging the eye of head larger gives me more strength and a trueropening.

What I claim, and desire to secure by Letters Pate'nt, is-

lnelliptic springs, the rubberpacking a c, the friction-thilnble (Z d,the bolt 0, having the rib gformed onits side, with a correspondingrecess in the ear of spring, all combined and arranged as herein setforth.

' FRANK KEELER.

Witnesses:

- W. G. LINEBURGH,

LAURA A. HUBBELL.

